Improvement in fire-proof roofing



UNITED STATES JOHN E. OOENELL, OE NEW YORK, N. Y.

IMPROVEMENT IN FIRE-PROOF ROOFING.

Specication forming part of Letters Patent No. 117,384, dated July 25,1871.

To all whom it may concern:

Be it known that I, JOHN B. CORNELL, of New York, in the county of NewYork and State of New York, have invented a new and Improved Fire-ProofRoof; and I do hereby declare the following to be a'iull, clear, andexact description of the same, reference being had to the accompanyin gdrawing making a part of this specification, in whieh l Figure 1represents a plan view of a roof where metal sheet is shown. Figs. 2 and3 are transverse views, showing two different forms of corrugation.

My invention relates to fire-proof rooing, and is more particularlyintended for use in the construction of Mansard roofs.

I will now describe all that is necessary to a full understanding of myinvention, andthen clearly point it out in the claim.

A, Fig. 3, represents a corrugated sheet of iron, dovetailed in form,and thereby better adapted to the application of plastering. A', Fig. 2,represents a sheet with plain curvilinear corrugations, which can berolled at less cost, and is yet equally well suited to the purpose Whereit is not intended to plaster. C are the ordinary plates of slate orimitation slate, which are arranged with relation to each other in theusual manner, but which are attached to the upward convex corrugation ofmetallic sheets A or A. D are screws or copper split nails, by which theplates are held to one another and to the sheets of metal. E, Fig. 3, isthe plastering, applied to the sheet A, and rendered more adhesivethereto by the peculiar form of the corrugation. B, in Fig. 2,represents the rafters, to which the sheets are firmly attached.

By combining the corrugated iron with the slates I secure: 1st, anentirely rire-proof roof. 2d, one to which the slates can be easilyattached. 3d, one which has channels that form a perfect conduit forwater. 4th, one whose unjointed surface renders it absolutelywater-tight under all circumstances.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A tire-proof roof, formed of slate C and corrugated metal sheet A',applied to a building in the manner specified.

2. The slate (l, sheet A, and plastering E, combined and applied as andfor the purpose specified.

JOHN B. CORNELL.

Witnesses:

A. A. JAYNE, Tnos. CROOKER.

